{
  "$type": "site.standard.document",
  "description": "A tyre (1) includes a tread portion (2) including a ground contact surface (13), a first rubber layer (21) made of a first cap rubber forming part of the ground contact surface, a second rubber layer (22) made of a second cap rubber disposed radially inwardly of the first rubber layer, and at least…",
  "path": "/patents/1398171",
  "publishedAt": "2025-02-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60C11/0041",
    "SUMITOMO RUBBER IND [JP]"
  ],
  "textContent": "A tyre (1) includes a tread portion (2) including a ground contact surface (13), a first rubber layer (21) made of a first cap rubber forming part of the ground contact surface, a second rubber layer (22) made of a second cap rubber disposed radially inwardly of the first rubber layer, and at least one groove portion (5) opening to the ground contact surface. The first cap rubber has a loss tangent tanδ1, and the second cap rubber has a loss tangent tanδ2 greater than the loss tangent tanδ1. The groove portion includes a first indicator (15) in which a bottom of the groove portion locally raises, the first indicator having an outer surface (15o) in a tyre radial direction. The radially outer surface of the first indicator substantially coincides with a first wear line (16) that is parallel to the ground contact surface and passes through a radially outer surface (22o) of the second rubber layer.",
  "title": "METHOD OF USING A TYRE"
}